Honeywell UDC3500 - 6.2 First Current Output Calibration

Input Calibration
280 UDC3500 Universal Digital Controller Product Manual 3/07
5.3 Preliminary Information
Disconnect the Field Wiring
Tag and disconnect any field wiring connected to the input terminals on the rear of the
controller.
R
+
–
+
–
Input 1
connections
R
Input 2
connections
Input 4
connections
+
–
30
29
31
32
33
34
35
36
28
Input 5
connections
+
+
–
R
Input 3
connections
–
Figure 5-1 Input Wiring Terminals
Equipment Needed
Table 5-2 lists the equipment you will need to calibrate the specific types of inputs that
are listed in the table. You will need a screwdriver to connect these devices to your
controller.
Table 5-2 Equipment Needed
Type of Input Equipment Needed
Thermocouple
Inputs (Ice Bath)
• A calibrating device with at least ± 0.02 % accuracy for use as a
signal source such as a millivolt source.
• Thermocouple extension wire that corresponds with the type of
thermocouple that will be used with the controller input.
• Two insulated copper leads for connecting the thermocouple
extension wire from the ice baths to the mV source.
• Two containers of crushed ice or a commercially available ice bath.
Thermocouple
Inputs (T/C Source)
• A calibrating device with at least ± 0.02 % accuracy for use as a
signal source such as a millivolt source.
• Thermocouple extension wire that corresponds with the type of
thermocouple that will be used with controller input.